Question

Sendo A = x – 3, B = x – 2 e C = x + 1, determine A² + B² + C.
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Answer 1

Resposta:

(x+1)²-2.(x+1).(x-1) +. (x-1)²

x² +2x +1 -2.(x² -1) + x² -2x +1

x² + x² -2x² +2x² -2x² + 1 + 1 -2

Resposta = 0